Logbook in ForeFlight Mobile 4 Logbook 5 About the Design ...
Logbook week 6
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Transcript of Logbook week 6
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The building features a joist flooring system and I beam joints.
(There is a slope near these founda:ons to keep it from becoming wet.)
Waffle concrete slab for the founda:ons. Created by u:lising polystyrene then pouring the concrete and removing this when set.
LVL beams to support upper level flooring-‐ there is a hole in each beam to thread u:li:es.
GROUP 2 CONSTRUCTION SITE
Has stable soil, thus shallow foo:ngs are u:lised.
Beams are bounded by adhesive and are also nailed. (Subflooring nailed to :mber joists).
Eventually the house will have a brick wall on the outside. It is a wooden
framed building. With a one way spanning system. Small type house (approx. 20 feet span range).
There are currently several temporary frames suppor:ng the structure.
Stones placed around the site for safety reasons and due to the high amount of trucks travelling through.
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Needed to be flaYened out as was on a hilly area of 30-‐40 degrees.
Steel frame has been used for the main structure.
Uses C beams and has metal strap :es.
It also has a retaining wall (concrete block).
Group 3 Construc:on Site
Hebel-‐ sand, lime and cement wall system-‐ prevents fire and also provides sound insula:on.
Self closing fire doors.
Metal bars for temporary structure as opposed to the wooden ones featured in our site.
Mainly comprises steel and wood
U:lises smart joists, fibreboard and chipboard.
Metal tooth plate connec:ons.
STEEL has good COMPRESSIVE and TENSILE proper:es.
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• A TILED ROOF: Should be constructed at pitches greater than 15°-‐ this is so water can run off. Below is a sketch of a roof system and you can see the various slopes that can be u:lised.
• DETERMINE WHETHER MEMBERS ARE IN TENSION OR
Sketch **, Zoe Brain, (2014)
The above sketch shows the difference in roofing systems in terms of pitch. In sketch ** you see the difference (from a birds eye view) of a gable and hip roof.
Sketch **, Zoe Brain, (2014)
GABLE ROOF
HIP ROOF
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Concrete Roofs: flat plates of reinforced concrete Structural Steel Framed Roofs: could be FLAT, SLOPING or PORTAL FRAMES. • FLAT= primary and secondary beams (if heavier/
concrete); beams and purlins if lighter. • SLOPING= roof beams, lighter sheet metal roofing and
purlins. • PORTAL FRAMES= series of braced rigid frames (2
columns and a beam) with purlins for the roof and girts for the walls (usually finished with sheet metal).
Trussed Roofs: constructed from open web type steel or :mber (trusses fixed together). Slope is oien determined by roofing materials selected. Space Frames: 3D plate structures. Long spanning in 2 direc:ons-‐ they’re welded, bolted or threaded together to form a matrix type structure. Gable Roofs: consist of common raiers, ridge beams and ceiling joists. Out triggers used for overhang. Hip Roofs: consist of common raiers, hip raiers, valley raiers, jack raiers, ridge beams and ceiling joists.
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Metals: Ferrous= Iron (4th most common element on Earth). Non ferrous-‐ all other metals (generally more expensive) and less likely to react with oxygen. Alloys= 2 or more metals (ferrous alloy contains iron).
Anodic end (more prone to corrosion) Magnesium Zinc Aluminium Structural steels Cast iron Lead Tin Copper, brass, bronze Nickel (passive) Titanium Stainless steels (430, 304, 316) Cathodic end (less prone to corrosion)
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Above is a sketch of the galvanic series.
The further away items are on the table the more likely they are to react (except steel and copper). Near sea should use stainless steel (less likely to corrode). Most roofs are galvanised with zinc and u:lise galvanised screws. Can have a zic roof and aluminium guYer but not vice versa.
Aluminium is non magne:c and non sparking.
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COMPRESSION: Think: if removed then what does it want to do-‐ if it wants to move out then it is under compression if it wants to go down then its in tension.
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If voussons in an arch are strong enough it can only fail by distor:ng-‐ spring failure (m shape) or rota:onal failure (slumped c shape) depending on weather they are in tension or compression.
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• References: • hYp://www.youtube.com/watch?
v=q5ms8vmhs50&feature=youtu.be • hYp://www.youtube.com/watch?
v=RYS_wgXGbI&feature=youtu.be • hYp://www.youtube.com/watch?
v=SQy3IyJy-‐is&feature=youtu.be • hYp://www.youtube.com/watch?v=Zx4tM-‐
uSaO8&feature=youtu.be • hYp://www.youtube.com/watch?
v=EDtxb7Pgcrw&feature=youtu.be • hYps://issuu.com/envs10003/docs/
week_06_guide/2?e=8943534/7434612
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